Estimation of Precipitation Variation in River Basin Scale with Outputs from an Atmosphere-Ocean General Circulation Model called by MIROC

Abstract

To estimate the precipitation variation in the designated river basin, the pattern classification method and weather generation algorithm are combined to take the downscale approaches for outputs of Atmosphere-Ocean General Circulation Model. The simulated results in the Shiribetu River and the Gokase River in Japan, showed the great difference in the special and temporal precipitation distribution. The hydrological impacts due to global warming in the river basin scale were evaluated through the distributed runoff model with 1km and 1hour unit data.